Could be several things. The one that comes to mind is low calcium levels.
A sudden painful involuntary contraction of a muscle is called a muscle cramp. This can happen due to various reasons such as dehydration, muscle fatigue, or poor blood circulation. Stretching and massaging the affected muscle can help alleviate the discomfort.
A muscle spasm caused by prolonged muscle contraction is called a "cramp." This localized involuntary contraction can be triggered by muscle fatigue, dehydration, or electrolyte imbalances. Cramps are usually sudden and can be painful, but they typically resolve on their own.
Another name for a muscle pull is a muscle strain. It occurs when muscle fibers are stretched or torn, usually due to overexertion or sudden movements. Symptoms include pain, swelling, and limited range of motion.
The calcium would come from the sarcoplasmic reticulum, which is a specialized structure found within skeletal muscle cells responsible for storing and releasing calcium ions for muscle contraction. A sudden release of large amounts of calcium from the sarcoplasmic reticulum can lead to uncontrolled muscle contractions and potentially muscle damage.
Muscle cramps are often associated with symptoms such as sudden and sharp pain in the affected muscle, muscle tightness or stiffness, visible twitching or bulging of the muscle, and difficulty moving the affected muscle. Other symptoms may include muscle weakness, soreness, and a sensation of knots or lumps in the muscle.
cramps
A sudden painful involuntary contraction of a muscle is called a muscle cramp. This can happen due to various reasons such as dehydration, muscle fatigue, or poor blood circulation. Stretching and massaging the affected muscle can help alleviate the discomfort.
A Cramp or a Sprain
It's called a "cramp".
A muscle spasm caused by prolonged muscle contraction is called a "cramp." This localized involuntary contraction can be triggered by muscle fatigue, dehydration, or electrolyte imbalances. Cramps are usually sudden and can be painful, but they typically resolve on their own.
instant movement
If someone hits you in the rectus abdominis muscle, you may experience temporary muscle pain or spasm in that area. You might feel a sudden tightening or stiffness in your core, and your body position may shift slightly as a protective response to the pain.
A cramp is a sudden over-shortening of a muscle. Cramps are involuntary and, often, severe. They can be extremely painful.
It is called a Tracheospasm
spasmodic is an adjective derived from the word spasm which is a noun.spasm : a muscle cramp; a painful and involuntary muscular contraction.spasmodic: relating to, affected by, or having the character of a spasm; fitful; convulsive; excitable with sudden outbursts of energy; happening intermittentlyexample:An overexerted and tired muscle can be spasmodic if it repeatedly has spasms.
MalNutrition
A muscle spasm is a sudden, spontaneous, uncontrollable and abnormal tightening or contraction of a muscle. The term muscle cramp is also used to describe a muscle spasm anywhere in the body, and when a muscle spasm occurs in the lower leg it is often called a "charlie horse." Spasms of the muscles will often be triggered after a sudden movement in a muscle that has not been used for a while, even if the movement is not forceful. Examples of this are muscle cramps that happen while asleep or after prolonged sitting. This is why athletes do warm up exercises before activity to prevent muscle spasm. Muscle spasms are not uncommon, and can become more frequent and intense with age, when fatigued as from overwork, or when the mineral levels of the body are lower than normal for normal muscle function. This is why athletes and those who work in high temperatures take salt tablets or drink fluids to replace the minerals that are lost from excess sweating.